please only answer these 2 question

1. test statistic Tstat=

2. the critical values is (are)

Nine experts rated two brands of coffee in a taste-testing experiment. A rating on a 7-point scale ( 1= extremely unpleasing, 7= extremely pleasing) is given for each of four characteristics: taste, aroma, richness, and acidity. The accompanying data table contains the ratings accumulated over all four characteristics. Complete parts (a) through (d) below. Click the icon to view the data table. a. At the 0.05 level of significance, is there evidence of a difference in the mean ratings between the two brands? Let 1 be the mean rating for brand A and 2 be the mean rating for brand B. Determine the null and \begin{tabular}{|r|r|r|r|} \hline & \multicolumn{1}{c}{ A } & \multicolumn{1}{c|}{ B } & \multicolumn{1}{c|}{ C } \\ \hline 1 & \multicolumn{1}{|c|}{ Expert } & Brand A & Brand B \\ \hline 2 & C.C. & 25 & 27 \\ \hline 3 & S.E. & 24 & 24 \\ \hline 4 & E.G. & 21 & 24 \\ \hline 5 & B.I. & 24 & 27 \\ \hline 6 & C.M. & 22 & 24 \\ \hline 7 & C.N. & 26 & 27 \\ \hline 8 & G.N. & 25 & 24 \\ \hline 9 & R.M. & 22 & 23 \\ \hline 10 & P.V. & 19 & 21 \\ \hline \end{tabular} Let 1 be the mean rating for brand A and 2 be the mean rating for brand B. Determine the null and alternative hypotheses for this test. A. H0:D0 (where D=12) B. H0:D=0( where D=12) H1:D>0 H1:D=0 c. H0:n0 (where n=12) D. H0:n=0( where n=12) (Type an integer or a decimal. Round to two decimal places as needed.) The critical value(s) is(are) 3.36,3.36 (Type integers or decimals. Round to two decimal places as needed. Use a comma to separate answers as needed.)